1: what is the background of those killed. Someone once told me that in a mass shooting look into the victim stories and see if someone was not what they seem 2: Are they actually dead? Funerals? Documentation? 3: give it a little more time to dig for inconsistencies. Videos seemed weird to me and a lot about the story at first glance didn't make since but I'm still waiting for the full spin.

Vegas is a good example of what a real mass shooting looks like because they didn't know what to do and were genuinely caught off guard by it. No one had a story ready which is why there was so much back tracking and lying as they tried to cover up the military nature of the attack